Headspace Sampling Apparatus with Sensor-Verified Vial Transfer
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Solution Overview
Problem
Existing headspace sampling systems for gas chromatographic analysis face errors due to unattended vial movement, potential vial misplacement, and risk of vial breakage, which can lead to incorrect analysis and potential release of toxic substances.
Innovation Solution
An apparatus and process for headspace sampling that includes a mobile station, a heater, a blocking device with movable elements, and sensors to detect container presence and position, ensuring safe and accurate vial management by preventing incorrect vial movement and placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If unattended automatic vial movement is implemented, then productivity is improved, but reliability deteriorates due to positioning errors and potential vial breakage
Solution Approach 1:
The patent implements sensors (first sensor upstream and second sensor downstream of the blocking device) that detect vial presence and provide feedback signals to the control unit. This feedback mechanism allows the system to verify vial positions before and after movement, correct positioning errors, and prevent operation when vials are improperly positioned, thereby maintaining reliability while achieving automation
Solution Approach 2:
The blocking device acts as an intermediary mechanism between the mobile station and the incubation oven. It physically controls vial passage through the system, allowing the control unit to manage vial movement safely and prevent breakage by ensuring proper positioning before allowing movement to proceed
2Reliability
If sensor detection and blocking device are added, then reliability is improved, but device complexity increases
Solution Approach 1:
The blocking device serves multiple functions: it physically blocks vial passage when needed, allows vial passage when open, supports the vial during positioning, and works in conjunction with sensors to provide controlled movement. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in overall system complexity while achieving improved reliability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents positioning errors of containers, ensures safe handling to avoid breakage and toxic release, and enhances the accuracy and reliability of gas chromatographic analysis by maximizing the concentration of substances in the headspace.
Implementation Method 1
the transition from the liquid phase to the head space must be maximized... the substances to be analyzed are 'moved' to the gaseous phase
Implementation Method 2
vials are heated and shaken so as to promote and accelerate the accumulation of the substance to be analyzed in the headspace
Data Source
AI summary
The present invention relates to an apparatus (1) for sampling the headspace, comprising: a mobile station (2) provided with a plurality of housing seats (21) to house a plurality of containers (100) for sampling the headspace; an oven (3); a blocking device (4) comprising at least one first mobile element (41) that moves between a first position adapted to prevent a container (100) from passing from the mobile station (2) to the oven (3), and a second position adapted to allow a container (100) to pass from the mobile station (2) to the oven (3); at least one first sensor (5a) placed upstream of the first mobile element (41), to detect the presence of a container (100) in a housing seat (21); a movement element (6) moving between said mobile station (2) and the oven (3), the movement element being configured to move a container (100) from the mobile station (2) to the oven (3).